Question

The function for the cost of materials to make a muffin is f(x)=3/4x+3 where x is the number of muffin the function for the selling price of those muffins is g(f(x)) where g(x)=3x+4 find the selling price of 20 muffins

Answer 1

G of F of X, in this case, would be 3(3/4x +3) + 4. Plugging in 20 gives you 3(3/4(20) +3)+4 = $58

Answer 2

Answer:

The selling price of those muffind is $58.

Step-by-step explanation:

The cost of materials to make a muffin is

$f(x)=\frac{3}{4}x+3$

Their selling price is determined by $g(f(x))$, where

$g(x)=3x+4$

So, to find the selling price of 20 muffin, we just have to introduce x=20 in the first function, and its results introduce it in the second function, because $g(f(x))$ expresses that the first function must be introduce in the second function.

$f(x)=\frac{3}{4}x+3\\f(20)=\frac{3}{4}(20)+3=3(5)+3=15+3=18$

Then,

$g(x)=3x+4\\g(18)=3(18)+4=54+4=58$

Therefore, the selling price of those muffind is $58.